Big Bang theory: Big bang proponents suggest that some 10 billion to 20 billion years ago, a massive blast allowed all the universe's known matter and energy—even space and time themselves.
The Big Bang is the cosmological model of the initial conditions and subsequent development of the Universe that is supported by the most comprehensive and accurate explanations from current scientific evidence and observation.[1][2] As used by cosmologists, the term Big Bang generally refers to the idea that the Universe has expanded from a primordial hot and dense initial condition at some finite time in the past (currently estimated to have been approximately 13.7 billion years ago[3]), and continues to expand to this day.
black hole
Nebular Hypothesis:
Quick facts:
- The universe is 13.7 billion years old
- All the matter in the universe used to be very close together (very dense)
- The universe used to be a very uniform cloud of energy/mass despite it being very clumpy today (galaxies being those clumps)
- Space began to expand and pushed matter apart
- The expansion of space is accelerating
- In the beginning the universe was so hot all the universal forces (gravitation, electromagnetism, etc.) were one force
-The accelerating expansion of the universe will one day spread galaxies so far apart we will not be able to see them because the light leaving them will constantly have new space created in front of it
Big Bang Theory
Big Bang theory: Big bang proponents suggest that some 10 billion to 20 billion years ago, a massive blast allowed all the universe's known matter and energy—even space and time themselves.
The Big Bang is the cosmological model of the initial conditions and subsequent development of the Universe that is supported by the most comprehensive and accurate explanations from current scientific evidence and observation.[1][2] As used by cosmologists, the term Big Bang generally refers to the idea that the Universe has expanded from a primordial hot and dense initial condition at some finite time in the past (currently estimated to have been approximately 13.7 billion years ago[3]), and continues to expand to this day.
Nebular Hypothesis:
Quick facts: